NEW YORK – Knowing what was likely to go down if the Bellator NYC headliners got too close to each other Friday night, security detail was on red alert for Chael Sonnen and Wanderlei Silva.

The main event light heavyweights, who meet Saturday at Madison Square Garden in New York at Bellator’s second pay-per-view event, got face to face Friday night at the ceremonial weigh-ins, which took place at The Theater at MSG. The official weigh-ins took place earlier in the day at the host hotel.

After Sonnen stepped on the same scale used by Joe Frazier and Muhammad Ali at “The Fight of the Century” in 1971 at The Garden, security personnel made sure things stayed on as much of an even keel as possible when Silva took the stage. Sonnen extended his arm to shake Silva’s hand, but the Brazilian wanted none of it and waved his finger at the American. Both fighters weighed in at 205.8 pounds for the main event.

Also stepping onto the stage for the fans were co-main event heavyweights Fedor Emelianenko and Matt Mitrione. The Russian great was 236.4 pounds, while Mitrione came in at 256.6.

Bellator NYC also features a trio of title fights. Michael Chandler defends his lightweight title against Brent Primus on the main card. The champ was 153.8, while Primus was 154.2. Welterweight champ Douglas Lima meets Lorenz Larkin with his belt on the line. Lima was 170 on the button; Larkin was 169.8. And to close out the Bellator 180 portion of the event on Spike, light heavyweight champ Phil Davis meets Ryan Bader in a rematch. Davis was 204.8, while Bader checked in at 204.4.

On March 19, 2011, 23-year-old Jon Jones brutalized UFC light heavyweight champion “Shogun” Rua to become the youngest titleholder in UFC history. But for Jones, it was only the start of a wild ride that at times spun out of control.